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首页> 外文会议>International Conference on Greenhouse Gas Control Technologies >THERMODYNAMICS OF AQUEOUS PIPERAZINE/POTASSIUM CARBONATE/CARBON DIOXIDE CHARACTERIZED BY THE ELECTROLYTE NON-RANDOM TWO-LIQUID MODEL IN ASPEN PLUS
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THERMODYNAMICS OF AQUEOUS PIPERAZINE/POTASSIUM CARBONATE/CARBON DIOXIDE CHARACTERIZED BY THE ELECTROLYTE NON-RANDOM TWO-LIQUID MODEL IN ASPEN PLUS

机译：哌嗪水溶液/碳酸钾/二氧化碳的热力学，其特征在于Aspen Plus的电解质非随机双液模型

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The Electrolyte Nonrandom Two-Liquid (NRTL) Activity Coefficient model in Aspen Plus™ v11.1 was used to develop a rigorous thermodynamic representation of an aqueous piperazine (PZ) and potassium carbonate (K_2CO_3) mixed-solvent electrolyte system for the application of carbon dioxide (CO_2) absorption/stripping from power plant flue gas. The model predicts the speciation and carbon dioxide solubility as a function of solvent composition, temperature, and pressure. These results provide the capacity of the solvent, the heat of absorption, and the concentration of reactive species (e.g. piperazine and piperazine carbamate (PZCOO)). Binary adjustable parameters for the potassium carbonate/piperazine mixed-solvent electrolyte system were obtained through the regression of water vapor pressure and calorimetry over potassium carbonate and potassium bicarbonate (KHCO_3) solutions, CO_2 solubility in potassium carbonate/piperazine, and proton nuclear magnetic resonance (NMR) of K_2CO_3/PZ speciation. As a result, the model satisfactorily correlates the experimental data of this mixed-solvent electrolyte system over a wide range of temperature, mixed-solvent concentration, and CO_2 loading.
机译：Aspen Plus™V11.1中的电解质非random二液（NRT1）活性系数模型用于开发用于施加碳的哌嗪（PZ）和碳酸钾（K_2CO_3）混合溶剂电解质系统的严格热力学表示二氧化碳（CO_2）吸收/从发电厂烟道气中剥离。该模型预测物质和二氧化碳溶解度作为溶剂组合物，温度和压力的函数。这些结果提供了溶剂，吸收热量和反应性物种的浓度的能力（例如哌嗪和哌嗪氨基甲酸哌嗪（PZCOO））。通过在碳酸钾和碳酸钾钾（KHCO_3）溶液（KHCO_3）溶液中的水蒸气压力和量热法，CO_2溶解度，通过碳酸钾/哌嗪（Khco）/哌嗪的钾溶解和质子核磁共振，获得二元可调节参数，得到碳酸钾/哌嗪混合溶剂电解质系统的二元可调节参数。 NMR）K_2CO_3 / PZ物种。结果，该模型令人满意地将该混合溶剂电解质系统的实验数据与宽温度，混合溶剂浓度和CO_2负载相关联。

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